Courtesy Nissan (online) sells a new radiator for about $750 plus shipping. If you have a hole that means you've already released AC chemicals into the atmosphere, so you're probably ok just removing everything yourself.
$750 for a radiator, $20 for engine coolant, $40 for AC chemicals, $7 for a 6-pack of beer and an afternoon of fun is all you really need.
Knock this puppy out on your own. It's easy too!
